Zune HD Device Firmware 4.3

When I synced my Zune HDs today, I got an alert about updating to a new device firmware version, 4.3. (The previous version was 4.1.) No word on what's changed, if anything, and I don't see anything about it online yet. Anyone?

Update: Microsoft later documented the update:

Today we released the v4.3 firmware update for Zune HD players; this update adds support for upcoming 3d games and applications, as well as an auto-suggest feature for better text input, and other minor improvements. Enjoy!

What’s new in Zune HD 4.3 Firmware

Support for the upcoming 3D games and applications.

Auto Suggest feature for text input.

Faster web browsing experience.

Landscape keyboard

Keyboard option has been added in the settings section.

New toggle between seek and presets under Radio.

Under the Internet in settings, you can now toggle to default mobile or desktop webpage layout.